1. the ending of a series or sequence

- the Alpha and the Omega, the first and the last, the beginning and the end

Definition categories: event, conclusion, ending, finish

2. the last (24th) letter of the Greek alphabet

Definition categories: communication, letter

Sentences with omega as a noun:

- I am the Alpha and the Omega, the First and the Last, the Beginning and the End. — Revelation 22:13, New International Version.